{
  "manageEntity": {
    "action": "Save",
    "entityId": "107366",
    "entityType": "Track",
    "nonce": "0x3dac4d462edd729298befafbce810f9a2df1ce20ce178d3d106a5d4f977cd6c1",
    "signature": "0xa97d9bd21dd45276246ec02efe79f4fed473e4426de53834aa383110b7a68bdb520dfae388f6606b9cf0a620c269d7acb438e58d4f94880cb307025295e50dea1c",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}