{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833229678",
    "entityType": "Track",
    "nonce": "0x06ba5d7ff206e53cf79c9a503a44f4ef5e7aac41e495d04fed0d644b7b5b6a1e",
    "signature": "0xcb3457c1d2e55ff72374f9d4891c6c031dace9baa4dd8d62e82b0dca73974ce34fa106846b9530f25df9210d7bd7af386b5792c1a4272a19b4271d8a6fc9be4a1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}