{
  "manageEntity": {
    "action": "Save",
    "entityId": "330543013",
    "entityType": "Track",
    "nonce": "0x1dde9fc2bc092113424f92eb6eebe85847ae9487f03ee86bfc7f4ac6abd0c45f",
    "signature": "0xf1e92578b44321eaa22e3cba8e594b0aa8680ef3379e7e60d9d2cbafd6b580f90bc0ccc448ceac86a7f08c235b730ba09adda7fce38aa8a87fe5b3d1acc43aaa1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}