{
  "manageEntity": {
    "action": "Save",
    "entityId": "1919235791",
    "entityType": "Track",
    "nonce": "0xa275b4cf381429c4df53988a2bdccc78b10bc87487c8b7748f281be9f777dacf",
    "signature": "0xb5980a6e381b06d562625c7b676bd33c0ce0b6c8cc0071f5d8d93190ba1fd95d6abde659f4ca1df15cca00ae3be028247abc3ac02f7a69b01cdddee6c08bfa4b1b",
    "signer": "0x4e2B03f40AC77640f6f598409177927dc845bcBb",
    "userId": "127912475"
  }
}