{
  "manageEntity": {
    "action": "Save",
    "entityId": "460160368",
    "entityType": "Track",
    "nonce": "0x380a176f2d1972deafa5eff98e5649339d32de38b6f8a979c8dcadc306f3fb6f",
    "signature": "0x7b3d7c728f2b32f77bb628727774470b411cc168e4d8a826e98f696b044c2b06601a2ff4a4fee60cd884cb0640001729ea3319a0757fada199f8f77f7fdd4f351c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}