{
  "manageEntity": {
    "action": "Save",
    "entityId": "142564",
    "entityType": "Track",
    "nonce": "0xdf01f551edcd065b5ae95e6674eacb4907a5b14c900dba7b1cb6723ed2a0162c",
    "signature": "0x554f5e05679cda2a234230d66bb6d417203835366a9fbe1a8b5395fda3fa706e4a827098fe010005a89cea93202c04f743610616ba10983476255da5fd1e146c1c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}