{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844571052",
    "entityType": "Track",
    "nonce": "0x599bdad29cbb76a40556b24ff8a42b41411a386f512d6c6860bc5e6b5a41f30d",
    "signature": "0xa6557fba59ed82574fe20c3fe6329a11694b971c209ab56ca07a28f8142a99913ec25f8ebce9329efe612ea66b82257bbf611b9a5f4db95e08b139ef3957b0f01b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}