{
  "manageEntity": {
    "action": "Save",
    "entityId": "630980",
    "entityType": "Track",
    "nonce": "0xdb1702d764b0bc384aa0f4ea8b5f0627ca87226263ca6e73c537d815e277d845",
    "signature": "0x05223aac9736310cdbd2e6b6b858e3d4d08834a844101b3fc7652dc8f78038f57eac902288e5ebbc5f7b53a02fc34a5f255e162c0a67870f8a3bbeb5e0d0a0471b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}