{
  "manageEntity": {
    "action": "Save",
    "entityId": "21799661",
    "entityType": "Track",
    "nonce": "0x60f7e50a9079f10df213ee432a0602842424f938cd6fcc78871469e81570be8b",
    "signature": "0xdfc895ff6be55a5ed3ebf4af5e30defe0bb2643c172df83d40648b3b551828d4721a38934dca12cd93792cea7a2481706b623e551e9cc3bc9b88064e270076971b",
    "signer": "0x32B0332272E4aDf7c8afA6cfa7ea34b85F773d72",
    "userId": "347088841"
  }
}