{
  "manageEntity": {
    "action": "Save",
    "entityId": "500452893",
    "entityType": "Track",
    "nonce": "0xde30c799efe2f453f488a9f7d66fe0799b775c3996f6290d4adf5d88dcf92f35",
    "signature": "0x11ff8616687c0ff7f0b5a15b28ab3a1b3ebaca77f11c1e7a2468277532f8dc1a0370010375ab4210e0f7383ffe6a205c52612281d094c305663e1529fb74715b1c",
    "signer": "0xcF1BC458908F84936B19Ca8Cf67C751CD647B02b",
    "userId": "310796"
  }
}