{
  "manageEntity": {
    "action": "Save",
    "entityId": "840487745",
    "entityType": "Track",
    "nonce": "0x032f47695e24d88cff0fc21006e3c426f45dc4e58b429c506a01b44462af7df4",
    "signature": "0x40d47197596e09db2e5e92452ea1c57d0c28232294a41a2b419408ec73b1b4cd66fa4b4a84401a6e7f1bfb8f703c2b2432769028d78da8a41dd6032ca7d3072b1c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}