{
  "manageEntity": {
    "action": "Save",
    "entityId": "541794",
    "entityType": "Track",
    "nonce": "0x0015ac55f42abd0f9a77ab9bf7fd5dea2a0870434a61e9bcc0684fcf9ed3caa9",
    "signature": "0x731e606399a8d39a5e497d713ed03c1d278818759ddae1248fdc5cd01bcebe8f4a2cab7d053c1e77ffbe609cf3e7f2b7bf32bf9abca5b65d13fb9ffa479cf4ea1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}