{
  "manageEntity": {
    "action": "Save",
    "entityId": "195420921",
    "entityType": "Track",
    "nonce": "0x6d9284293da4245d219394702c070040306888db9c6ee9283d503a112c4b5aac",
    "signature": "0x14fc6e24b1271b7c3938c28efae6fff6a283e7fceb98be901dfc6e4978bb62c353bfa0020b406d3bf92201a854cdab9a0d172189754b28df9cbfa13a39574f121c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}