{
  "manageEntity": {
    "action": "Save",
    "entityId": "397965",
    "entityType": "Track",
    "nonce": "0x8d662c3b59321274a639a680fa458c5428db641432dcc042b08e310f7c618190",
    "signature": "0xf03cfb957a3f95e605e548262a5047d264bbc2cff53e7ee56dee7d672074fe3d562fc7f8c6dce006dfd2d371120b8be4000aedd5953d66f66221fe7b352b0cd71b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}