{
  "manageEntity": {
    "action": "Save",
    "entityId": "209316",
    "entityType": "Track",
    "nonce": "0xe551fc1311b27e646b34845e00768db338a6be451107197e5fd7d3c4c1f2190c",
    "signature": "0x63505e40c2fc295469b9afc84bd1e2959f15cfa31df43305602e691478bd5145662d710e6836eee46af3f4e49756b5a361f9caed9d635465e5b1b06dcb8d72ab1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}