{
  "manageEntity": {
    "action": "Save",
    "entityId": "1051592153",
    "entityType": "Track",
    "nonce": "0xdf921b3cd313cb05c63b618229cd2e5283acf9817ef2303b675ad27d70d3b329",
    "signature": "0xc44b47d7e2b93bd0d8630aa1e7647ae54ba3bb5dcea75610efc5499d9bbc6dfc55daa74a68eb90563e3e6959709ca8e40bd4dbd5e4a427e5d3c3952a0a8b74751c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}