{
  "manageEntity": {
    "action": "Save",
    "entityId": "1979571593",
    "entityType": "Track",
    "nonce": "0x29dac8890091236d2c695d13001b8538ce8c499403a713c5d478326ed76ebeee",
    "signature": "0x2f8ea636dfd11277fc34f61996b7bfbdd6f41bd1f4fe336bc60892d641dd059c3273136cb43c938e998cd57ff453b9584fe2e04845cca4f8aea8cc88890cdf4f1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}