{
  "manageEntity": {
    "action": "Save",
    "entityId": "701974096",
    "entityType": "Track",
    "nonce": "0xead0c66788b98f894a41ee17159f6c461bb7f9c0298521166147b215c190a381",
    "signature": "0x4496d0c849d981ec04a420e51cdc5c3d9b15b3e42e2dc308efe72c40faeb40c6721537e3eb4334d4e0b7dd874fbdd92434b66a05bd86af78023a1f93f08d6d3d1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}