{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045835",
    "entityType": "Track",
    "nonce": "0x5f6a82d2a705f690d755de3c8b8b19ad98bcb8bdec1a2cd3b447a1a4765a3524",
    "signature": "0x2df8bb404f265e63ab961cd7fc61f639fa949cc7463d80fd6cc8c2839810f4875bcc2c7aaceefef5fadd0e1a966ec030326421efc7e0050172876b92abbd73781b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}