{
  "manageEntity": {
    "action": "Save",
    "entityId": "1263180722",
    "entityType": "Track",
    "nonce": "0xd45937600c4d0ca721535e2daf539e86d4daf0ba0a2f3c2822bd4e126d01fb40",
    "signature": "0x88b79651c52d8d8888a207c1f3192048d53035ab2c14894541608bb94d15e4142ea048532b98d4de73c004278035596805e77e0e223f1eec2505130eda2963d21c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}