{
  "manageEntity": {
    "action": "Save",
    "entityId": "532802884",
    "entityType": "Track",
    "nonce": "0x1d0f668caf388e0aaea63e50e416a5c3ed17c21239ee30e8a4a69c048fbe5359",
    "signature": "0xea0c70e0f5115b25b5f2cda9fc037c749e580366b83b2ce5c1db5e68dd975f7e70e19de9ff7fe6ebfc24a86357b682d57f173d4d7c7d9083580dc263616d20321b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}