{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021357",
    "entityType": "Track",
    "nonce": "1786022559377594934",
    "signature": "0x28de3d0d631ab4ddd2643cac9e6d873700a207e968b21e7544dbdbe2b73b10c849b10b85a7d5a49bf8a46a594f73097a488e5bdc127c71da3b899e15f59d97b81c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}