{
  "manageEntity": {
    "action": "Save",
    "entityId": "1145272831",
    "entityType": "Track",
    "nonce": "0x3bd066b810d6f36f1a956036af8255d43fa88126e59655838a78217ec4ba7bcb",
    "signature": "0x7e2403bd859639fd6754f7890695f9af3a6125deb6f14f7d1f9a60f53637d82a7638e9e9c95d1a7934b37d47085cf06925f5b87d6bea28ff2bcfb354c74a70a01b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}