{
  "manageEntity": {
    "action": "Save",
    "entityId": "1948152717",
    "entityType": "Track",
    "nonce": "0x2769942b8879a32a7897ab52ff72fb84f99d14b415fce43a546c95342b2210ad",
    "signature": "0x0e1957b4671aefcb80736511b9eb9195d3199a56a8d73df3de4f9c2b0d94444063df02e6d828b4fbb7ecd255d13f5cdd3f2e44fd3259350908a15c7baec598651c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}