{
  "manageEntity": {
    "action": "Save",
    "entityId": "338226",
    "entityType": "Track",
    "nonce": "0x84ad64d4e772cecd523ba0d57547bc76b918e88dda3e5d52daf7e92908219d0e",
    "signature": "0xd128b01b0a512081f3bcb41835085c9250ff0bfc9557609324cdad70552a7360570b69a0882e54b90463e59989ae765e680b5f327acee87fe253f3c9edc45dda1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}