{
  "manageEntity": {
    "action": "Save",
    "entityId": "2081626676",
    "entityType": "Track",
    "nonce": "0x723cf7d94dac3b2ae2be6c07f2ac70999d56c9edda36d80a4e714e7b779a9589",
    "signature": "0xcd1b4aed8db87bac8f19c6566d98dfdd21776277493512bbaa5fe3c0c9d12f415c6b9592c5d6c8a9d26364b667bb9b89f8dd4ff2e4448493e330e852e773171f1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}