{
  "manageEntity": {
    "action": "Save",
    "entityId": "460915592",
    "entityType": "Track",
    "nonce": "0x127478f82ed09b1fdddac8109de9c36293f9dc92c72fd8fe10cad1d3b117fbeb",
    "signature": "0x9951d6b107c5f2c827b975d28975d99bca997a5ed4ad7d044891f7987e05c4f21ab5d18b4b0f4efe2342eaf477de69884c7e0e1fb889fda0aace2afa5af6dfb71b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}