{
  "manageEntity": {
    "action": "Save",
    "entityId": "1854944736",
    "entityType": "Track",
    "nonce": "0x9671b32bea9274e7426291c961a0f98e5d1d6ccaf5868af3b17003407e4b983d",
    "signature": "0x1dd22bfba0106f22c6d531135bce67fcf057b3cc652b80836e2a9f5bd2d6027051da2ecdfc7633a1e7d180de9a30d3562063ad312764bd6cee442591b85cbb541c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "105826"
  }
}