{
  "manageEntity": {
    "action": "Save",
    "entityId": "1916870723",
    "entityType": "Track",
    "nonce": "0xb155cd6b097343d265e9a134576b1648af06d081871446e7746601a62337810b",
    "signature": "0x4aee784632e5851fae4203586ff97d48e366f40495a32fcf294b8cc505b979285b11ff45ae5bd069a0e3fcd8d26edf788214d612bb47f0b2edb19cca14e02bb61c",
    "signer": "0x4C66E76dF182632f358E9724C2428c52873236B9",
    "userId": "710666555"
  }
}