{
  "manageEntity": {
    "action": "Save",
    "entityId": "839974501",
    "entityType": "Track",
    "nonce": "0x41257d5a503eca66134f72e9326fcde90db5c44ebe92f669e68c9eb568077d3d",
    "signature": "0x018d6022039798f654da0b4d52c4c87a817167e14aadd3e5a4b5490c9b6c35d378a64c843cb83177452714fc80fb12256e2ee77e645428db97b15aebd4854e101b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}