{
  "manageEntity": {
    "action": "Save",
    "entityId": "1504365726",
    "entityType": "Track",
    "nonce": "0xece016be8ebd368f1a0a2c20feb14a5b3da95777c8ee5f867dd80ee8edee7fac",
    "signature": "0xf71682fb61233f525df40b0bacf2fbc21345ed7a1e5f84c453305dcd77baa8ac38a5949889713d3191d7ea9c924000006cc1bc6f957b3205e646a41d9791b9f61b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}