{
  "manageEntity": {
    "action": "Save",
    "entityId": "564575292",
    "entityType": "Track",
    "nonce": "0x5caf5348a64d0e1870b3e2e4626b84186895f8795b0b3cf333d1a2139ef9421e",
    "signature": "0x0d8ad185d109469587855da78a507cb7c2fce5e40fad8a017e462d02c45ec3b14cfd6a1d366cf328eb8fd862979c211201089a596e7a0720ed690a1210948c941b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}