{
  "manageEntity": {
    "action": "Save",
    "entityId": "875986029",
    "entityType": "Track",
    "nonce": "0x8ca5f4ab2640e56ecfa146a9ddba43776ba3aacbcb8f564ecb52708a7af9478c",
    "signature": "0x6289fad4f2cc8b1db4969628fed03d7b54261929160c0eb51274abee1c60c67d234c820ac4aee39bc1271334ab0ee8dff6d312d735231f784e7fbeda449bba531b",
    "signer": "0xB755CddA6da08Cbad290b9528CD0dC860f9f7dd5",
    "userId": "536791428"
  }
}