{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348136656",
    "entityType": "Track",
    "nonce": "0x75b0181edcd8a017a14875199b3bc1d63fc6d08b98e81ef0eeb3cb092682cbd1",
    "signature": "0xf2f2b00ac9cabe226d7245c5ace3b69f79f374de0ac52e200cc53c98bd6cf8795c3626f07ef3a3f484bcd252b5a02c2e35698397497f5f7fbd8ec89f7b9313ca1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}