{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038439",
    "entityType": "Track",
    "nonce": "0xf99d008b5b64b478980317ff02a58445e1debd2b799f81ccf701d1f40caa9661",
    "signature": "0x50d26e04219f55010e6443b2f9f06aad56b15a88afbfed138d055f06ef37fcfd2fcf952a0de1308acd5422674ee823a13e33f5f40dc8c2b741f8fac9bd02b75f1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}