{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012116",
    "entityType": "Track",
    "nonce": "0xddd1b802e97c29282f16becda95e2b357a85be01b00ea457c6f78881b9d2e282",
    "signature": "0xb3e7f5bcbe7091a74047a6866f4d0259f1f477177bc193a19b9f35b9723efdfc51ed528f7548095b11a131cc9982b754f130abd64185c20254e183a1fc3581bf1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}