{
  "manageEntity": {
    "action": "Save",
    "entityId": "541273",
    "entityType": "Track",
    "nonce": "0x8920247a9d8f9f15dde3fff0fbce6ff8293c99c7038330ac35def4d80c4895d4",
    "signature": "0xad3ff89d17de5e4e2657cd1edc6301ce0213680acb7837562b85f2b155135db22a4a71552cb003eeec76b1402abf7206b933f078cce2d94c389b09ce0935b7091b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}