{
  "manageEntity": {
    "action": "Save",
    "entityId": "51521005",
    "entityType": "Track",
    "nonce": "0x327eaa0349bd9bd04f3d427090b8755c6e42aecd20f43f9cd427e707958fa579",
    "signature": "0x194e1b675c2bfbaf09a25322b6f669779293e668f371e3aba0161ac9a230605f1be057916e3eb977c05dd51c80d5eb89887afe1c85acde753d26e555a49f35a91b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}