{
  "manageEntity": {
    "action": "Save",
    "entityId": "1764356260",
    "entityType": "Track",
    "nonce": "0x6aae873d26f4f24c4e936ccf6c7db9a7a058987627cb27986c169cdc3c566694",
    "signature": "0x180e40d90fc566053cadb12f729b3d161823efcf4218f747ed404e1eba342e9c344b03c38c40b3a3d2b62e7ce8c68e6a5ccf458b5ec5cff3cddb408ad171deaa1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}